Express the following as the simplest form of fraction.

$35\%$

The bar graph given below presents the number of shoes manufactured by a company on the different days of a week.

The number of shoes manufactured on $\mathrm{D}1$ is what percentage of shoes manufactured on $\mathrm{D}7$?

A student obtained 17 marks out of 20 marks. Find his percentage of marks. 

(A) 85% 

(B) 80% 

(C) 83% 

(D) 82% 

If $15\% of (x + y) = 45\% of (x - y)$, then $y$ is how much percent of $x$?

In a college, $40\%$ students are graduates. If the number of graduates is $7000$, then what are the total number of students in the college?

There are $1500$ students in a school, $15\%$ are Muslims, $7\%$ are Sikhs, $8\%$ are Christians and remaining are Hindus. How many Hindu students are there in the school?

Achyutaya opens a tea-shop by investing Rs. 25000. He spends 30% of this amount on furnishing and 20% of it on buying other essential materials for the shop. What amount remains with him to buy remaining materials for his shop?